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Tsiganis et al. [Tsiganis, K., Gomes, R., Morbidelli, A., Levison, H.F., 2005. Nature 435, 459–461] have proposed that the current orbital architecture of the outer Solar System could have been established if it was initially compact and Jupiter and Saturn crossed the 2:1 orbital resonance by divergent migration. The crossing led to close encounters among the giant planets, but the orbital eccentricities...
We describe a scaling relationship that can be used to characterize the results of numerical smooth particle hydrodynamic (SPH) experiments of potential satellite-forming impacts. The relationship is used to interpret and summarize data from 41 such SPH simulations, all employing an impactor-to-target mass ratio of 3:7, but with a variety of total masses and angular momenta. The results can be utilized...
The tidal interaction of a protoplanet with a circumstellar gaseous disk results in mutual angular momentum exchange that modifies both the disk and the orbit of the secondary. There are two, conceptually distinct circumstances wherein nebula torques can cause a secular variation in a protoplanet's semimajor axis. (I) The net torque exerted on a secondary by an undisturbed disk is not, in general,...
The effects of collective particle behavior on the trapping strength of a perturber's mth order outer Lindblad resonance in a planetesimal disk are examined. We find that if the particle disk supports density waves, the spiral disk potential generated in response to forcing by the perturber shields particles from the perturber and may greatly diminish the perturber's ability to trap particles undergoing...
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